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Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone
Ice-albedo feedback due to the albedo contrast between water and ice is a major factor in seasonal sea ice retreat, and has received increasing attention with the Arctic Ocean shifting to a seasonal ice cover. However, quantitative evaluation of such feedbacks is still insufficient. Here we provide...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5557900/ https://www.ncbi.nlm.nih.gov/pubmed/28811530 http://dx.doi.org/10.1038/s41598-017-08467-z |
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author | Kashiwase, Haruhiko Ohshima, Kay I. Nihashi, Sohey Eicken, Hajo |
author_facet | Kashiwase, Haruhiko Ohshima, Kay I. Nihashi, Sohey Eicken, Hajo |
author_sort | Kashiwase, Haruhiko |
collection | PubMed |
description | Ice-albedo feedback due to the albedo contrast between water and ice is a major factor in seasonal sea ice retreat, and has received increasing attention with the Arctic Ocean shifting to a seasonal ice cover. However, quantitative evaluation of such feedbacks is still insufficient. Here we provide quantitative evidence that heat input through the open water fraction is the primary driver of seasonal and interannual variations in Arctic sea ice retreat. Analyses of satellite data (1979–2014) and a simplified ice-upper ocean coupled model reveal that divergent ice motion in the early melt season triggers large-scale feedback which subsequently amplifies summer sea ice anomalies. The magnitude of divergence controlling the feedback has doubled since 2000 due to a more mobile ice cover, which can partly explain the recent drastic ice reduction in the Arctic Ocean. |
format | Online Article Text |
id | pubmed-5557900 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-55579002017-08-16 Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone Kashiwase, Haruhiko Ohshima, Kay I. Nihashi, Sohey Eicken, Hajo Sci Rep Article Ice-albedo feedback due to the albedo contrast between water and ice is a major factor in seasonal sea ice retreat, and has received increasing attention with the Arctic Ocean shifting to a seasonal ice cover. However, quantitative evaluation of such feedbacks is still insufficient. Here we provide quantitative evidence that heat input through the open water fraction is the primary driver of seasonal and interannual variations in Arctic sea ice retreat. Analyses of satellite data (1979–2014) and a simplified ice-upper ocean coupled model reveal that divergent ice motion in the early melt season triggers large-scale feedback which subsequently amplifies summer sea ice anomalies. The magnitude of divergence controlling the feedback has doubled since 2000 due to a more mobile ice cover, which can partly explain the recent drastic ice reduction in the Arctic Ocean. Nature Publishing Group UK 2017-08-15 /pmc/articles/PMC5557900/ /pubmed/28811530 http://dx.doi.org/10.1038/s41598-017-08467-z Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Kashiwase, Haruhiko Ohshima, Kay I. Nihashi, Sohey Eicken, Hajo Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
title | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
title_full | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
title_fullStr | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
title_full_unstemmed | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
title_short | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
title_sort | evidence for ice-ocean albedo feedback in the arctic ocean shifting to a seasonal ice zone |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5557900/ https://www.ncbi.nlm.nih.gov/pubmed/28811530 http://dx.doi.org/10.1038/s41598-017-08467-z |
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